diff --git a/cli/rt/06_util.js b/cli/rt/06_util.js
index b0ed5696fa..011fa6de5c 100644
--- a/cli/rt/06_util.js
+++ b/cli/rt/06_util.js
@@ -53,7 +53,6 @@
   function immutableDefine(
     o,
     p,
-    // eslint-disable-next-line @typescript-eslint/no-explicit-any
     value,
   ) {
     Object.defineProperty(o, p, {
diff --git a/cli/rt/99_main.js b/cli/rt/99_main.js
index 846216ec4d..c6d6d13955 100644
--- a/cli/rt/99_main.js
+++ b/cli/rt/99_main.js
@@ -1,7 +1,6 @@
 // Removes the `__proto__` for security reasons.  This intentionally makes
 // Deno non compliant with ECMA-262 Annex B.2.2.1
 //
-// eslint-disable-next-line @typescript-eslint/no-explicit-any
 delete Object.prototype.__proto__;
 
 ((window) => {
@@ -292,9 +291,9 @@ delete Object.prototype.__proto__;
     if (hasBootstrapped) {
       throw new Error("Worker runtime already bootstrapped");
     }
-    // Remove bootstrapping methods from global scope
-    globalThis.__bootstrap = undefined;
-    globalThis.bootstrap = undefined;
+    // Remove bootstrapping data from the global scope
+    delete globalThis.__bootstrap;
+    delete globalThis.bootstrap;
     util.log("bootstrapMainRuntime");
     hasBootstrapped = true;
     Object.defineProperties(globalThis, windowOrWorkerGlobalScopeMethods);
@@ -360,9 +359,9 @@ delete Object.prototype.__proto__;
     if (hasBootstrapped) {
       throw new Error("Worker runtime already bootstrapped");
     }
-    // Remove bootstrapping methods from global scope
-    globalThis.__bootstrap = undefined;
-    globalThis.bootstrap = undefined;
+    // Remove bootstrapping data from the global scope
+    delete globalThis.__bootstrap;
+    delete globalThis.bootstrap;
     util.log("bootstrapWorkerRuntime");
     hasBootstrapped = true;
     Object.defineProperties(globalThis, windowOrWorkerGlobalScopeMethods);
@@ -412,7 +411,6 @@ delete Object.prototype.__proto__;
         workerRuntime: bootstrapWorkerRuntime,
       },
       configurable: true,
-      writable: true,
     },
   });
 })(this);
diff --git a/cli/tests/unit/globals_test.ts b/cli/tests/unit/globals_test.ts
index dabe3c08e1..5fc125296e 100644
--- a/cli/tests/unit/globals_test.ts
+++ b/cli/tests/unit/globals_test.ts
@@ -5,6 +5,13 @@ unitTest(function globalThisExists(): void {
   assert(globalThis != null);
 });
 
+unitTest(function noInternalGlobals(): void {
+  // globalThis.__bootstrap should not be there.
+  for (const key of Object.keys(globalThis)) {
+    assert(!key.startsWith("_"));
+  }
+});
+
 unitTest(function windowExists(): void {
   assert(window != null);
 });
diff --git a/cli/tsc/99_main_compiler.js b/cli/tsc/99_main_compiler.js
index aa334907a4..dede279c15 100644
--- a/cli/tsc/99_main_compiler.js
+++ b/cli/tsc/99_main_compiler.js
@@ -14,7 +14,6 @@
 // Removes the `__proto__` for security reasons.  This intentionally makes
 // Deno non compliant with ECMA-262 Annex B.2.2.1
 //
-// eslint-disable-next-line @typescript-eslint/no-explicit-any
 delete Object.prototype.__proto__;
 
 ((window) => {
@@ -1528,7 +1527,7 @@ delete Object.prototype.__proto__;
     core.registerErrorClass("TypeError", TypeError);
     core.registerErrorClass("Other", Error);
     core.registerErrorClass("Busy", errors.Busy);
-    globalThis.__bootstrap = undefined;
+    delete globalThis.__bootstrap;
     runtimeStart("TS");
   }
 
diff --git a/op_crates/web/08_text_encoding.js b/op_crates/web/08_text_encoding.js
index e938eecd1e..f759fb66ce 100644
--- a/op_crates/web/08_text_encoding.js
+++ b/op_crates/web/08_text_encoding.js
@@ -393,7 +393,6 @@
     }
   }
 
-  // eslint-disable-next-line @typescript-eslint/no-explicit-any
   function isEitherArrayBuffer(x) {
     return x instanceof SharedArrayBuffer || x instanceof ArrayBuffer ||
       typeof x === "undefined";
diff --git a/op_crates/web/event_test.js b/op_crates/web/event_test.js
index 4f9f94fa96..f533d78fb4 100644
--- a/op_crates/web/event_test.js
+++ b/op_crates/web/event_test.js
@@ -72,7 +72,6 @@ function eventPreventDefaultSuccess() {
 }
 
 function eventInitializedWithNonStringType() {
-  // eslint-disable-next-line @typescript-eslint/no-explicit-any
   const type = undefined;
   const event = new Event(type);